Ignis fatuus

	1.	A phosphorescent light that appears, in the night, over marshy ground, supposed to be occasioned by the decomposition of animal or vegetable substances, or by some inflammable gas; - popularly called also Will-with-the-wisp, or Will-o'-the-wisp, and Jack-with-a-lantern, or Jack-o'-lantern.
	2.	Fig.: A misleading influence; a decoy. Scared and guided by the ignis fatuus of popular superstition. - Jer. Taylor.

Noun	1.	ignis fatuus - a pale light sometimes seen at night over marshy ground Synonyms: friar's lantern, jack-o'-lantern, will-o'-the-wisp
	2.	ignis fatuus - an illusion that misleads Synonyms: will-o'-the-wisp

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